SOME TIMES IT STARTS, SOME TIMES IT WONT

  • Tiny
  • johns1955
  • 2000 Chevrolet Silverado
  • 125,000 miles

Replaced filters. Fuel pump, computer chip, one time it will start, next time it wont

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Monday, December 12th, 2011 AT 8:58 PM

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  • Tiny
  • rasmataz
  • Member

http://www.2carpros.com/articles/car-cranks-but-wont-start

Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

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Monday, December 12th, 2011 AT 9:05 PM

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